<form action="<?php echo site_url("admin/date_filter"); ?>" method="post">
<input type="text" name="date_start" class="date" value="<?php echo str_replace("-","/",$date_start); ?>"  />
<input type="text" name="date_stop" class="date" value="<?php echo str_replace("-","/",$date_stop); ?>" />
<input type="hidden" name="action" value="<?php echo $action; ?>" />
<input type="submit" value="กรองวันที่" />
</form>